Burglar-alarm.



No. 806,532.. Y PATENTED DEG.,5,1905..

H. PREI. BURGLAR ALARM.

7 APPLICATION FILED MAXI], 1905 UNITED STATES PATENT OFFICE.

HENRY FREI, OF ALLEGHENY, PENNSYLVANIA. BURGLA R- ALARM.

' To all whom it may concern.-

' Be it known that I, HENRY FREI, a citizen of Switzerland, residing atAllegheny, in the county of Allegheny and State of Pennsylvania, haveinvented certain new and useful Improvements in Burglar-Alarms, of whichthe followingis a specification, reference being had therein to theaccompanying drawings.

This invention relates to certain new and useful improvements inburglar-alarms, and relates more particularly to an alarm adapted to beused in connection with a door, transom, or hinged member.

The invention has for its primary object to provide a novelburglar-alarm in the form of an attachment that can be readily appliedto door-frames, whereby it can be actuated by the opening of a door ortransom. In this connection I have employed a conventional form ofclockwork mechanism having an alarm attachment and have employed novelmeans in conjunction with the clockworkmechanism for actuating the alarmeach time.

the door is opened, also means for releasing the alarm of the clockworkmechanism at night-time or at any time the mechanism may lie set tosound an alarm by the opening of a oor. I My improved alarm isconstructed whereby it can be readily used as a door-bell to notify theoccupants of a compartment that a door is opened, or the alarm maybe setto be actuated by the opening of a'door by unauthorpartly in section.Fig.4 is a top plan view of a toothed sector employed in connection withthe burglar-alarm. Fig. 5, is a side elevation view of the same. Figsfl. 6 and 7 are detail views of clappers employed in con nection withthe burglar-alarm.

To put my invention into practice, I" employ a conventional form ofalarm-clockwork for operating my improved burglar-alarm.

Specification of Letters Patent.

Application filed May 11, 1905. Serial No. 259,974-

'nile class.

with the levers 21 and 26, the lever 21 is I Patented Dec. 5, 1905.

In the accompanying drawings I have illustrated a suitable casing 1,having a clockwork 2 mounted therein, which is adapted to be manuallywound by the winding arbor 3. The clockwork which I employ carries aclapper 4, which is adapted to be operated by the clockwork at apredetermined time, which is set by mechanism common to ordinaryalarmclocks;

Myinvention resides in mounting the clockwork in a suitable casing whichis provided with a hinged door 5, whereby easy access may be had to thecasing in order to windthe 'works. The top of the casing is providedwith a standard 6, adapted to support a bell 7, and in constructing thestandard 6 I make a portion of the same hollow to accommodate a pin 8.away, as indicated at 9, to permit of a toothed sector 10 being securedto the lower end of the pin 8: The standard 6 is provided with anoutwardly-extending bracket 11 in which is journaled avertically-disposed pinion-shaft 12, with which the toothed sector 10engages. The pinion-shaft 12 carries a disk 14, to which are slidablyconnected clappers 1515. 7 These clappersare slotted, as indicated at 1616, and are slidably connected near'the periphery of the disk 14 bysuitable screws 17 17. The upper end ofthe pin 8 is provided with anoutwardly-extending arm 18, and this arm is The one side of the standard6 is" cut.

normally held in one position by a spring 19,

carried by the upper end of the standard 6.

Secured to the outer end of the arm 18 is a rod 20, which is adapted toengage a lever 21,'

pivotally mounted upon a door 22. This lever is provided with anenlarged head 23, having a groove 24 formed therein,'in which the end ofthe rod 20 is adapted to engage.

The door 22 is provided with a pin 25 to normally hold the lever 21 in alateral positiori. The door 22 is also provided with apivotally-mounted' auxiliary lever 26 and a pin 27. In operation thelever 26 is adapted to engage an outwardly-extending arm 28, carried bya pivotally-mounted bar 29, which is adapted to engage the clapper-rod30 of the clapper 4.

The casing 1 of my improved burglar-alarm is adapted to be secured tothe door-frame 31 of the door 2, preferably near the top thereof,whereby the alarm and its appurtenant parts cannot. be tampered with bythe juve- When the door 22 is equipped adapted to operate the alarmevery time the door is opened, the alarm in this instance servingfunctionally as a door-bell. When the door carrying the lever 21 isopen, the end of the lever striking the rod causes the pin 8 to rotatethrough the medium of the arm 18, and as said pin is partially rotatedthe pinion-shaft 12 is rotated through the medium of the toothed sector10, carried by the pin 8. When the pinion-shaft 12 rotates, the disk 14:is revolved, causing the clappers 15 15 to fly outwardly in engagementwith the hell 7 and sound an alarm.

In order to sound a night-alarm, the lever 21 is disengaged from the pin25 and permitted to hang in a vertical position, and the alarm-settingmechanism is then wound and the bar 29 placed in engagement with theclapper-rod to prevent the clapper 4 from engaging the bell until thedesired time. To retain the bar 29 in engagement with the clapperrod 30,the lever 26 is swung upwardly into engagement with the pin 27 until itsend engages the lever 28 and retains the bar 29 in engagement with theclapper-rod. When the door is swung open, the end of the bar 29 engagingthe clapper-rod 30 is moved away from the clapper-rod and permits of theclock mechanism operating the clapper in order to sound the bell 7 andgive an alarm indicating that the door 22 has been opened.

The clapper 4 and the levers 26 and 29 are only employed to sound analarm when the door 22 is opened of a night by an unauthorized personand the hell 7, lever 21, and rod 20 employed as a day-alarm ordoor-bell.

I do not care to confine myself to any special form of mechanism that Imay use for actuating my improved alarm; nor do I care to limit the useof the alarm in connection with a door, as it can be readily used inconnection with transoms or swinging or hinged members.

WVhat I claim, and desire to secure by Letters Patent, is-

1. In an alarm of the type described, the combination with a suitablespring-motor mechanism and a door, of a bell carried by said mechanismand adapted to be sounded by a clapper, a pin journaled in said bell, arevoluble disk mounted in said bell, atoothed sector carried by said pinand adapted to actuate said disk, clappers slidably mounted upon saiddisk and adapted to strike said bell, an outwardly-extending arm carriedby the upper end of said pin, levers pivotally connected to said door,one of said levers being adapted to engage said arm to sound said bell,a bar carried by said mechanism and adapted to engage the clapper ofsaid mechanism, the other of said pivotally-mounted levers being adaptedto engage said bar, substantially as described.

2. In an alarm, the combination with a suitable spring-motor mechanism,a bell, a clapper actuated by said mechanism and a door, of revolubleclapper-s mounted within said bell, levers pivotally connected to saiddoor, means actuated by one of said levers to revolve said clapper-s andsound said bell, and means actuated by the other of said levers torelease the first-named clapper to sound said bell, substantially asdescribed.

In testimony whereof I afiix my signature in the presence of twowitnesses.

HENRY FREI.

WVitnesses:

H. O. EvER'r, E. E. POTTER.

